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DEGRADATION MECHANISMS IN SOLID OXIDE ELECTROLYSIS ANODES: Cr POISONING AND CATION INTERDIFFUSION
Figure 2: A picture of the oxygen side of a used cell after disassembly
Peeled off bond layer
and electrode
Air
Steam
Figure 3: Raman data collected from a point each from the dark and light region on the oxygen side of
cell 3, showing the presence of new phases formed after decomposition of the perovskite structure
After the preliminary phase identification by Raman Spectroscopy, nanoscale scanning Auger
Electron Spectroscopy was used to study the cross-section of the different cells. We probed the LSC
region of one of the used cells. Figure 4 is a SEM image of the LSC region for one of the used cells.
Figure 5 is the Auger spectra of the different areas in this region shown in Figure 4.
Figure 4: SEM image of the cross-section of a used cell (LSC region)
142 NUCLEAR PRODUCTION OF HYDROGEN – © OECD/NEA 2010